APA
Petersen O., . (1955). Precancerous Changes of the Cervical Epithelium: in relation to manifest cervical carcinoma. Copenhagen: Danish Science Press.
Chicago
Petersen Olaf, . 1955. Precancerous Changes of the Cervical Epithelium: in relation to manifest cervical carcinoma. Copenhagen: Danish Science Press.
Harvard
Petersen O., . (1955). Precancerous Changes of the Cervical Epithelium: in relation to manifest cervical carcinoma. Copenhagen: Danish Science Press.
MLA
Petersen Olaf, . Precancerous Changes of the Cervical Epithelium: in relation to manifest cervical carcinoma. Copenhagen: Danish Science Press. 1955.